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authorKees Cook <keescook@chromium.org>2020-09-02 05:53:43 +0300
committerIngo Molnar <mingo@kernel.org>2020-09-03 11:28:35 +0300
commitb3e5d80d0c48c0cc7bce56473672f4e6e1210910 (patch)
tree09dcae6063d2212f18c6807464f93e3f92a669ce /arch/arm64/Makefile
parent414d2ff5e5f21049b6b242271a6a8579f9dffc1b (diff)
downloadlinux-b3e5d80d0c48c0cc7bce56473672f4e6e1210910.tar.xz
arm64/build: Warn on orphan section placement
We don't want to depend on the linker's orphan section placement heuristics as these can vary between linkers, and may change between versions. All sections need to be explicitly handled in the linker script. With all sections now handled, enable orphan section warnings. Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Acked-by: Will Deacon <will@kernel.org> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Link: https://lore.kernel.org/r/20200902025347.2504702-2-keescook@chromium.org
Diffstat (limited to 'arch/arm64/Makefile')
-rw-r--r--arch/arm64/Makefile4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index 6de7f551b821..081144fcc3da 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -29,6 +29,10 @@ LDFLAGS_vmlinux += --fix-cortex-a53-843419
endif
endif
+# We never want expected sections to be placed heuristically by the
+# linker. All sections should be explicitly named in the linker script.
+LDFLAGS_vmlinux += $(call ld-option, --orphan-handling=warn)
+
ifeq ($(CONFIG_ARM64_USE_LSE_ATOMICS), y)
ifneq ($(CONFIG_ARM64_LSE_ATOMICS), y)
$(warning LSE atomics not supported by binutils)